Hey all, does anyone know of a website or something similar were I can learn/brush up on some math formulas and equations that is commonly used in machining and general gunsmithing? I am currently a 2111 small arms repairer/technician with a package inbound to the 2112 school in Quantico, VA. I have talked to a couple 2112's already and they say that the number one hurdle for students is the math aspect. Anyone willing to help me out? Thanks.